2019
DOI: 10.1017/s1759078719000801
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A novel defect ground structure for decoupling closely spaced E-plane microstrip antenna array

Abstract: In this paper, a novel decoupling technique for closely spaced E-plane patch antennas using defect ground structure (DGS) is proposed. The electric field coupling between the antennas is suppressed by etching DGS which consists of a pair of rectangular slots and four stubs on the ground plane. Moreover, unlike the other methods, the DGS is not etched in the middle of the antennas but loaded along the outer edge of the radiated patch. Thus, through the adopted technology the distance between the antenna element… Show more

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Cited by 7 publications
(6 citation statements)
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References 23 publications
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“…shows the detail dimensions of the three-element antenna array with the decoupling structure. Firstly, the authors design a rectangular DGS to block the propagation of the coupling current on the ground in the closely spaced two-element microstrip antenna array [30], as shown in Fig.2. It can be seen from Fig.3 that after loading the rectangular DGS, the isolation increases from 13.6 to 18.7 dB at 4 GHz, but the center frequency is slightly offset (from 4 GHz to 3.92 GHz).…”
Section: A Three-element Array With Decouplnig Structure Designmentioning
confidence: 99%
See 1 more Smart Citation
“…shows the detail dimensions of the three-element antenna array with the decoupling structure. Firstly, the authors design a rectangular DGS to block the propagation of the coupling current on the ground in the closely spaced two-element microstrip antenna array [30], as shown in Fig.2. It can be seen from Fig.3 that after loading the rectangular DGS, the isolation increases from 13.6 to 18.7 dB at 4 GHz, but the center frequency is slightly offset (from 4 GHz to 3.92 GHz).…”
Section: A Three-element Array With Decouplnig Structure Designmentioning
confidence: 99%
“…It can be concluded from Fig.7 (a) that the isolation of the three-element antenna array is still low after the rectangular DGS is loaded. Therefore, the method proposed in [30] to etch the rectangular DGS cannot solve the coupling of the multi-element linear arrays. In Fig.5 (c), the rectangular DGS provides the reverse current at the outer edge of antenna 1 and antenna 3, and the metallized vias make partial coupling currents to reverse near antenna 2, alleviating the coupling current and improving isolation.…”
Section: B Decoupling Mechanism Analysismentioning
confidence: 99%
“…Zhang et al . [11] have used periodic fractal and arc-shaped DGS for achieving a maximum mutual coupling reduction of −22 dB. Similarly, periodic U-shaped DGS is proposed to reduce −10 dB mutual coupling between antenna elements [12].…”
Section: Introductionmentioning
confidence: 99%
“…Besides the advantages, MIMO antennas have low isolation due to the very close spacing among the antenna elements. Hence, to reduce the correlation coefficient various techniques were developed, which include placing parasitic stubs/strips between antenna elements [9,10], defecting the ground plane [11,12], etc. A compact UWB-MIMO antenna is presented in [9] which consist of a stepped radiator with a shared ground plane.…”
Section: Introductionmentioning
confidence: 99%
“…In order to improve the gain of the single element, a new fractal geometry is proposed in such a manner to increase the overall surface area of the element as well as to resonate the structure at 12.51 GHz. Further improvement in gain is achieved by constructing an eight-element antenna array [26][27][28][29][30][31] using the proposed single antenna.…”
Section: Introductionmentioning
confidence: 99%